Magnetostructural transitions and magnetocaloric effects in Ni50Mn35In14.25B0.75 ribbons

Abstract

The structural, thermal, and magnetic behaviors, as well as the martensitic phase transformation and related magnetocaloric response of Ni50Mn35In14.25B0.75 annealed ribbons have been investigated using room-temperature X-ray diffraction (XRD), differential scanning calorimetry (DSC), and magnetization measurements. Ni50Mn35In14.25B0.75 annealed ribbons show a sharper change in magnetization at the martensitic transition, resulting in larger magnetic entropy changes in comparison to bulk Ni50Mn35In14.25B0.75. A drastic shift in the martensitic transformation temperature (TM) of 70 K to higher temperature was observed for the annealed ribbons relative to that of the bulk (TM = 240 K). The results obtained for magnetic, thermal, structural, and magnetocaloric properties of annealed ribbons have been compared to those of the corresponding bulk alloys.

Structural, Magnetocaloric, and Magnetic Properties in Heusler Ni50Mn35In10X5 (X = Ga, Fe and Al) Alloys

“…Also, these values are comparable to those of Heusler alloy ribbons such as The calculated values of RC are comparable to those of rare-earth-based systems near RT [32][33][34][35][36][37]. Also, these values are comparable to those of Heusler alloy ribbons such as Ni 50 Mn 35 In 13.9 B 1.1 (140 J/kg with ∆H = 5 T) [38], Ni 50 Mn 35 In 14.25 B 0.75 (43 J/kg with ∆H = 5 T) [39], and Ni 48 Mn 39 In 13 (85 J/kg with ∆H = 5 T) [40]. Thus, the obtained RC and ∆S M values close to T C make these studied alloys attractive as potential magnetic refrigerant materials, observing the interest of studies linked to the minor addition of elements to Ni-Mn-In based Heusler alloys [41].…”

Tuning of the magneto-caloric effects in Ni43Mn46In11 magnetic shape memory alloys by substitution of boron

“…This situation reveals that the reversibility of MCE increases with the increase in the boron ratio, that is, the reversibility can be improved by tuning the boron ratio. In addition, the values of ∆S M of Ni 43 Mn 45.0 B 1.0 In 11 alloy are higher than parent alloy 21.5 kg −1 K −1 [36] and comparable with other inverse Ni-Mn based alloys at 5 T such as ∼16 J kg −1 K −1 for Ni 50 Mn 35 In 13.9 B 1.1 [22], ∼18 J kg −1 K −1 for Ni 50 Mn 34 B 1 In 15 [34], ∼30 J kg −1 K −1 for Ni 47 Mn 37 Si 3 In 13 [33], ∼22.8 J kg −1 K −1 for Ni 46 Co 3 Mn 37 In 10 Ge 4 [17], 14.6 J kg −1 K −1 for Ni 49.8 Co 1.2 Mn 33.5 In 15.5 [60], 22 J kg −1 K −1 for Ni 43 Mn 46 Sn 10.5 B 0.5 [59], 18.9 J kg −1 K −1 for Ni 50 Mn 35 In 14.5 B 0.5 [61], 16.0 J kg −1 K −1 for Ni 50 Mn 35 In 14.25 B 0.75 [62].…”